1. Department of Obstetrics and GynecologyTurku University Hospital, University of Turku Turku Finland
2. Department of Health SciencesTampere University Tampere Finland
3. Department of Laboratory MedicineKarolinska Institute Stockholm Sweden
4. VL‐Medi Clinical Research CenterFamily Federation Finland Helsinki Finland
5. Infections and Cancer Epidemiology GroupInternational Agency for Research on Cancer Lyon France
6. Department of Clinical MicrobiologySkåne University Hospital Lund Sweden
7. Department of Obstetrics and GynecologyUniversity of Helsinki Helsinki Finland